cars = 100 #把100赋给cars
space_in_a_car = 4 #把4赋给space_in_cars
drivers = 30 #把30赋给drivers
passengers = 90 #把90赋给passengers
cars_not_driven = cars - drivers #把cars的值减去drivers的值的结果赋给cars_not_driven
cars_driven = drivers #把drivers的值赋给cars_driven
carpool_capacity = cars_driven * space_in_a_car
average_passengers_per_car = passengers / cars_driven


print("There are", cars, "cars available.")
print("There are only", drivers, "drivers available.")
print("There will be", cars_not_driven, "empty cars today.")
print("We can transport", carpool_capacity, "people today.")
print("We have", passengers, "to carpool today.")
print("We need to put about", average_passengers_per_car, "in each car.")
